public function __construct(&$parent)
 {
     parent::__construct($parent);
     $this->_name = 'Reference Link';
 }
 public function checkPostFieldData($data, &$message, $entry_id = null)
 {
     $result = parent::checkPostFieldData($data, $message, $entry_id);
     // if new entry, required field && show_created, bypass required option
     if ($this->get('show_created') === '1' && $result === self::__MISSING_FIELDS__ && is_null($entry_id)) {
         $message = '';
         return self::__OK__;
     }
     return self::__OK__;
 }